Pipe-wrench



-Shreveporh in the county of Caddo 'ride novel means invention appertains.

sterne S. A. GUIBERSON. JR., GF LOS ANGELES, CALIFORNA. t

sten-wennen.

Spccicaton o Letters Patent.

.lnpltcation filed august 28, 1920. Serial No. 406,546.

To all whom it may concern:

Be it known that l, (inonon B. Tnnw, :It citizen of the United States, residing,y at and State of Louisiana, have invented a new and useful Pipe-lVrench, oi which the following in a specification. y

The device Ytormingthe subject matter ot this application is a wrenc-h, adapted to handle a pipe or other piece ot' material which is circular in cross section, and one object of the invention is to provide novel means whereby a grip portion of the wrench may ne held in closed position with Yrespect to the material.

Another object of the invention is to provfor operating and controlling the jaws which engage the material.

A further object ot the invention is to provide novel. means whereby the material cannot be crushed or marred by' the jaws.

lt is ithin the province oitne" disclosure to improve generally and to enhance the utility of devices of that' type towhich the @with the above. and other objects in view, which willappear as the description 3roeeeds, the invention resides in the combina-k tion and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that, with in the scope ot what is claimed, changes in the precise embodiment of the invention shown can be n'iade withoutdeparting trom the spirit or' the invention.

ln the accompanying drawings :Mv

ll'igure l shows in side elevation, a 'wrench constructed in accordance with. the intention., parts being broken away; Fig. 2 is an elevation wherein the wrench is viewed edgewise.

rihe wrench comprises a forked -head in cluding an arm 2 and an ai'in 3, the arm having n lateral projection 3l). The arm .2

terminates in bifurcations 4;, the arm 3 terminating in bifurcations 5. The head 1 has ears-s il. one ear being supplied in its end with ,t or notch 60. The head 1 has an open in; 'l' communicating with the space. between the ears 6. f

The numeral 8 designates an arcuate grip, one part 9 et which is located between the bifurcation d of the arm :2. The grip 8 is connected to the bifurcations 4; hy a pivot element 10. A curvedspring 11 is connect- .tends to maintain manipulationot the latch.

ed at one end 12 to the part 9 of the grip 8 relatively 'near to the pivot element 10, the spring,` 11 4extending inwardly. The free end 1l ot the grip 8 extends between the Abifurcations and is provided with a traueverse .shoulder 15.'

The numeral 16 denotes a latch having an opening 17 wherein the shoulder 15 ot' the (fri 8 is received, the shoulder cooperating with the latch at one end of the opening 17. The latch 16 is beveled as indicated at 18 and defines an acute angle with the adjacent portion of the grip '18. Because the latch 16 vis beveled as indicated at 18, the grip 8 will engage automatically with the latch when the grip is swung to a closed position, and because the end of the latch 1J defines an acute angle with the adjacent portion of the grip, the finger, of Aan operator may be inserted readily between the; end of the latch `and the grip, to disengage the latch from The rear end of1 the latch 16 is indicated at' 11)a`sprng 90 being betweenthe said end of the latch ot' the head 1. The spring 90 the latch 16 engaged with the shoulder 1:5 on the grip 8. lThe latch 16 is pivot-ally mounted, as indicated at 75, on the projection of the arm 3 and terminates in a thumb piece 20, facilitating the the grip.

tapered as interposed and the, arm 3 laws 21 are mounted for limited reciprocatlon in thegopening 7 of the head 1.i in con tact with the outer edges of the opening.

The jaws 21 are supplied with elongated slots 22, through which `entend pins 23, the'eiids of the pins being mounted in the head 1. The teeth 24 of the jaws 21 Slope in opposite directions, to facilitate the holding1 of the work, when the wrench is swung in one direction or in an opposite direction.

it. fulcrum bolt 25 is carried by the ears 6 of thelhead 1. rthe numeral 2.6 denotes a handle Ahaving an enlargement 27 mounted to swingen the fulcruni bolt 25 and located between the ears 6. On the inner end of the enlargement 26 are cam surfaces 28, each of which is adapted to coperate with the inner end of one ot the jaws 21. A T-sh'aped dog 29 is pivoted at 30 to the handle 26 and is adapted to coact with the seat 60, in a way to be pointed out hereinafter.

hen the article which is to be rotated is inserted between the arms 2 and 3 of the head 1, and when the grip 8 is swung to a so-i essai Patented Aug. 16, 1921,;

closed position, the piece of material engages Athe spring 11 and tends to hold 'the grip.. in a closed position until the grlp'has been advanced far enough toward a oompletely closed position, so that the llatch 16 under the impulse of the spring 90, engages the Shoulder 15 of the grip, and holds the grip closed, as hereinbefore set forth.

- When the handle 26 is manipulated, to turn the object, the handle swings on the ulcrum bolt 21, and advances the jaw to cause the jaw to grip the object which is to be rotated. If the'handle 26 is swung in one direction, then one of the jaws 21 will be actuated, whereas,`

if the handle is swung in an opposite direc" tion, the other of the jaws will be actuated.

. The dog 29 may be swung on its pivotal mounting 30, so that one end or the other of thev dog will be received in the seat 60.

`When the handle 26 has tilted or swung an appreciable amount,on the fulcijum bolt 25,

I `the dog, engaging with the vrear end of the ear, at one endof the seat 60, prevents further swinging movement of the handle. As a consequence, the jaw 21 can be advanced a predetermined amount only, and it will be practically impossible to crush the .obect which is being turned, or to mar 'the object to an undesirable extent.

Having thus described the invention, what is claimed is:

l 1. A wrench comprising a head having arms; a grip extended between the arms;'

I jaws slida'ble in thehead; and a handle ful- ()ne of Vthe cam surfaces 28 coperaties with the corresponding jaw crumed on the head ing the jaws. i

2. A wrench comprisingv a loop-shaped head; jaws slidable in the head and shaped at their inner ends 'for engagement with the and having cards engagobject to be rotated; and handle ful# crumed on the head and having cams engaging the outerends of the jaws, to advance one jaw at a time, when the handle Vis swung in oppositedirections.

3. A Wrench comprising a head' having arms; a grip extended between the arms, the grip being pivoted at one end to one arm; a latch mounted on the other arm and interlocked with the other end of the grip, the

irst specified end'of the grip being provided Withan inwardlypz'ojecting spring adapted to engage the work.; jaws slidable in the head; and a handle '.fulcrumed on the head and having cams engaging the jaws.

A. A .wrenchcompiising a head having arms; a grip extended between the arms;

.jaws slidable in the head; a handle ful- 

